Pump-jack



A. s. D. FRENCH.

PUMP JACK.

APPLICATION FILED JUNE 3, I919.

A TTOHNEYS ARTHUR SMITH n. FRENCH, or BIXBY, OKLAHOMA.

PUMP-JACK.

Specification of Letters Patent.

Patented Apr. 6, 1920.

Application filed June 3, 1919. Serial No. 301,394.

To all whom it may concern: Y

Be it known that I, ARTHUR S. D. FnnNoH, a citizen of the United States, and a resident of Bixby, in the county of Tulsa and State of Oklahoma, have invented certain new and useful Improvements in Pump- Jacks, of which the following is a specification. p

My invention relates to pump jacks, and

more particularly to that type of pump'jack.

including a normally stationary frame and a rock-er mounted to oscillate thereon.

An important object of my invention is to provide a pump jack of this type with adjustable bearings whereby the pump jack can be adapted to the varying conditions met with in different wells.

Another object is to provide adjustable V bearings whereby the stroke may be varied as desired.

Another object is to provide a pump ack with a rocker and adjustable bearings there for and thereon; all of which are so constructed as to preserve strength and rigidity and at the same time, allow of ready adjustment with the least manipulation.

Other objects and advantages reside in certain novel features of the construction. arrangement and combination of parts and will become apparent as the description proceeds, reference being had tothe accompanying drawings forming a part of this specification, and in which:

Figure 1 is a perspective view of the pump jack assembled,

Fig. 2 isa detail perspective view of the rocker saddle,

Fig. 3' is a detail perspective view of the adjustable hanger bearing,

Fig. 4c is a detail view showing in front elevation the clevis for the pull rods. 7

Referring to the drawings, it will be seen my pump jack comprises a suitaole base which may be in the form of a sill 10. A pair of forwardly inclined legs 11, erably pipe sections, have their lower ends a substantial distance apart and seated in the sill 10, and have their upper ends open. These legs converge toward their upper ends to form an inverted V, and together with the braces 12 constitute the normally sta tionary frame. Turn buckles 12 are provided in the braces 12 and comprise means whereby the position of the frame may be varied.

An adjustableroclrer bearing is mounted on the legs 11 of the frame. Thisbeariug comprlses spaced journals 13 which consist of flattened body portions having alined openings and integral stud pins 14 which project into the upper open ends of the. pi legs as shown in dotted lines in Fig. 1. A. saddle block 15 has an integral depending lug 15 extending entirely across the bot.' w

tom thereof, and this lug is provided with a transverse bore extending therethr-ough. The saddle block is mounted between the journals 13 and the bore thereof is alined.

with the openings of the journals. A pivot bolt 16 is passed through the openings of the journals and the bore of'the lug and is secured therein. The saddle block 15 is pro videdalong its upper longitudinal edges with upstanding flanges 17 and a clamp member 18 is provided on each of its longitudinal edges with depending flanges 1 Bolts 20 cooperate with the saddle block and clamp. member to 'efl'ect the desired adjustment. i

The rocker indicated generally at21 is mounted on the saddle block and secured thereto by the clamp 18 hereinbefore described. The rocker is triangularly shaped, having a horizontal arm, adownwardly depending arm at right anglesto the horizontal arm, and an arm connecting the outer extremities of the horizontal arm and the downwardly depending arm. The rocker arms comprise spaced'parallel bars 22 which overlap each other at the juncture of said arms, as shownin Fig.3. A' sleeve 23 has 7 its opening alined with alined openings provided in said overlapping portions and servesto maintain the bearings in proper spaced relation. A bolt 24 passes through the openings and through the sleeve, and

firmly secures the whole.

The horizontal arm of the rocker is mounted upon the saddle block and the fflanges thereof engage and confine the, lower portions of the parallel bars. Flanges of the clampengage and confine the upper portions of the parallel bars and in this manner, the rocker is effectively secured in its adjusted position to the rocker bearing;

Adjacent theouter endof the horizontal arm of the rocker a hanger bearing 25 is ad justably secured. This hanger bearing comprises anupper bearing block 26 and a lower clamp member 27 The upper bearing block and the lower clamp member are provided alongtheir longitudinal edges with flanges 26 and 27 respectively, to engage the spaced parallel bars of the rocker arm and are held in firm engagement therewith by means of bolts 28. The bearing block 26 is provided with a journal 29 and mounted on this journal is a hanger 30 in the form of an inverted U-bar. This hanger carries at its lower end the gripping clamp 31 which engages the polish-rod 32.

Adjacent the outer extremity of the downwardly depending arms of the rocker, the adjustable bearing 33 is secured. This hearing is provided with a clamp member and flanges, identical with that of the hanger bearing, for securing it to the rocker arm. The journal portion of this bearing carries the cross head 34 to which the pull rods 35 are connected.

The outer ends of the pull rods are provided with a clevis 36 as shown in Fig. 4 for connection with the source of power. This clevis comprises a transverse pin 37 secured to the pull rods, and a hook 38 fastened to said pin which is attached to the connections to the source of power.

In operation the pull rod is connected to a source of power for imparting oscillatory movement to the rocker which in turn effects a reciprocatory motion to the polish-rod of the pump.

Heretofore in the art requirements incident to the different conditions peculiar to various wells, have made it necessary to construct aspecial jack for each well, or at least to tear down the jack and rebuild it to adapt it to these requirements. In my invention, any adjustment necessary to adapt the jack to the requirements in wells may be easily and quickly carried out. The position of the frame may be adjusted by means of the turnbuckles, the rocker may be adjusted in the rocker bearings on said frame, the hanger hearing may be adjusted on the horizontal arm of the rocker, and the pull rod may be adjusted on the depending arm of the rocker.

sociated with said saddle block for adjustably securing said rocker thereto.

2. A pump ack comprising an ad ustable frame includlng pipe legs open at their upper ends, journals provided with alined openings 1n their body portions and having integral stud pins projecting into said open ends, a rocker bearing oscillatably mounted between said journals, a rocker adjustably secured to said rocker bearing, and means for oscillating said rocker.

3. A pump jack comprising a frame, a

rocker mounted for oscillating motion on said frame including spaced parallel bars having alined openings near each of their ends, spacing sleeves alined with said openings, and means extending through said sleeves for securing said bars in spaced relation, a rocker bearing mounted on said frame and upon which said rocker is mounted, a hanger bearing mounted on said rocker, and a pull rod bearing mounted on said rocker, said rocker bearing, hanger bearing, and pull rod bearing including a block having flanges engageable with the outer face of said spaced parallel bars, a clamp member having flanges engageable with the outer face of said parallel bar at the opposite edge thereof, and means cooperating with said clamp member and said block extending be tween said parallel bars.

ARTHUR SMITH D. FRENCH, 

